You can't copyright something that almost EVERYONE uses or creates. He was thinking of making something similar to it, not copying the same thing that he just snapshotted.

If you have photoshop or G.I.M.P. it's pretty simple. Take a square and turn it into a rectangle by stretching it. Then make another square that is the same height as the first rectangle you made, but make it so it's a little smaller width-ways. Then skew it down-wards until you feel it looks right. Then copy/paste that layer, and put -100% for width, what it does is it reverses the shape without much effort.